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Grenade shells.

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Grenade shells.

Unread postAuthor: warhead052 » Sun Jun 05, 2011 12:38 pm

Ok, I have made some new burst disk grenade shells based on Davidvainis 1-1/4" shells for his 3 barrel launcher. I am having a bit of a problem though. The disks keep breaking before I even start pumping air in. I had a few successful attempts yesterday, and they made a nice bang, but these ones are not working. Should I try and sand the edges to a rounded edge so it does not cut the aluminum foil?


Edit, link to davids shells. http://www.spudfiles.com/forums/viewtopic,p,188434.html#188434
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Unread postAuthor: clemsonguy1125 » Sun Jun 05, 2011 1:03 pm

I would try that before anything else, if it cutting the foil, thats probably the problem
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Unread postAuthor: warhead052 » Sun Jun 05, 2011 1:06 pm

I have 10 shells, so I have 10 trys to experiment. I will try sanding down one and see what happens.
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Unread postAuthor: clemsonguy1125 » Sun Jun 05, 2011 1:08 pm

Also try twisting the couple as you slide it over the foil tape.
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Unread postAuthor: warhead052 » Sun Jun 05, 2011 1:13 pm

Thats usually what I do, except it cuts it. And its not foil tape...
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Unread postAuthor: clemsonguy1125 » Sun Jun 05, 2011 2:06 pm

well there is you problem. Foil rips way to easily, I would try the foil tape.
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Unread postAuthor: warhead052 » Sun Jun 05, 2011 2:08 pm

Ok, what would be the bursting pressure of 1 layer (just a strip of tape folded over its self)?
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Unread postAuthor: clemsonguy1125 » Sun Jun 05, 2011 2:52 pm

I think Davidvaini might of said around 70 PSI but Im not sure. I think he just stuck the sticky side to the pipe and slid the coupler over it.
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Unread postAuthor: warhead052 » Sun Jun 05, 2011 3:08 pm

Ok. Well we shall see soon. I should be going to lowes in about an hour, so yeah. When I get back, I will test it out. Also, my cloud is not inputting enough air, what should I do to increase the flow?
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Unread postAuthor: clemsonguy1125 » Sun Jun 05, 2011 3:23 pm

What is restricting the flow, if its a blowgun, you can mod it for better flow, check out MrCrowleys tutorial.
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Unread postAuthor: warhead052 » Sun Jun 05, 2011 3:38 pm

I think it may be the tubing, I will get some more parts for it and expand it a bit more. I am also going to get a 2" coupler and end cap so I can make a tennis ball burst disk mortar.... I think its gonna sound like a 50 cal round. It may not go down too well with my neighbors, but it will be super fun at 3:00AM.
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Unread postAuthor: warhead052 » Sun Jun 05, 2011 3:41 pm

I think it may be the tubing, I will get some more parts for it and expand it a bit more. I am also going to get a 2" coupler and end cap so I can make a tennis ball burst disk mortar.... I think its gonna sound like a 50 cal round. It may not go down too well with my neighbors, but it will be super fun at 3:00AM.

Edit, stupid internet made me double post.... Mod remove this post and leave the other please?
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